TypeScript React HOC using `forwardRef`

foo.tsx

import * as React from 'react';
import { Component, ComponentClass, createRef, forwardRef, Ref } from 'react';

const myHoc = <ComposedComponentProps extends {}>(
    ComposedComponent: ComponentClass<ComposedComponentProps>,
) => {
    type ComposedComponentInstance = InstanceType<typeof ComposedComponent>;

    type WrapperComponentProps = ComposedComponentProps & {
        wrapperComponentProp: number;
    };
    type WrapperComponentPropsWithForwardedRef = WrapperComponentProps & {
        forwardedRef: Ref<ComposedComponentInstance>;
    };

    class WrapperComponent extends Component<
        WrapperComponentPropsWithForwardedRef,
        {}
    > {
        render() {
            const {
                forwardedRef,
                wrapperComponentProp,
                ...composedComponentProps
            } = this.props;

            return (
                <ComposedComponent
                    ref={forwardedRef}
                    // We need a cast because:
                    // https://github.com/DefinitelyTyped/DefinitelyTyped/issues/32355
                    // https://github.com/Microsoft/TypeScript/issues/28938#issuecomment-450636046
                    {...composedComponentProps as ComposedComponentProps}
                />
            );
        }
    }

    return forwardRef<ComposedComponentInstance, WrapperComponentProps>(
        (props, ref) => <WrapperComponent forwardedRef={ref} {...props} />,
    );
};

type MyComponentProps = { composedComponentProp: number };
class MyComponent extends Component<MyComponentProps> {}

const ref = createRef<MyComponent>();
const badRef = createRef<ComponentClass<{}>>();

const MyComponentAfterHoc = myHoc(MyComponent);

//
// Tests
//

// should succeed:
<MyComponentAfterHoc composedComponentProp={1} wrapperComponentProp={1} />;
<MyComponentAfterHoc
    composedComponentProp={1}
    wrapperComponentProp={1}
    ref={e => {}}
/>;
<MyComponentAfterHoc
    composedComponentProp={1}
    wrapperComponentProp={1}
    ref={ref}
/>;

// should error:
<MyComponentAfterHoc
    composedComponentProp={1}
    wrapperComponentProp={1}
    ref={badRef}
/>;
<MyComponentAfterHoc composedComponentProp={'1'} wrapperComponentProp={1} />;
<MyComponentAfterHoc composedComponentProp={'1'} wrapperComponentProp={'1'} />;
<MyComponentAfterHoc />;

I ended up using decomposing the ref and prop types from ForwardRefExoticComponent, see my gist.

It let me wrap the HOC multiple times and errored on badRefs, although not the most extensively tested.